There has been a report and notice that PM service is not available so your phone will pickup the stronger signal in your area which is roaming to a US carrier if you don't have wifi available. It should go back to normal soon...keep your fingers crossed.
PM sent me a text to say I am roaming in USA when in fact I am sitting in my living room on Galiano Island.
This means that your phone really was roaming and was connected to a tower in the US. You could manually set your phone to only use the Public Mobile network.
